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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
2006 2
2007 1
2008 3
2009 2
2010 2
2011 2
2012 3
2013 4
2014 4
2015 12
2016 5
2017 4
2018 4
2019 3
2020 6
2021 2
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50 results
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Page 1
Less screen time and more frequent vigorous physical activity is associated with lower risk of reporting negative mental health symptoms among Icelandic adolescents.
Hrafnkelsdottir SM, Brychta RJ, Rognvaldsdottir V, Gestsdottir S, Chen KY, Johannsson E, Guðmundsdottir SL, Arngrimsson SA. Hrafnkelsdottir SM, et al. Among authors: johannsson e. PLoS One. 2018 Apr 26;13(4):e0196286. doi: 10.1371/journal.pone.0196286. eCollection 2018. PLoS One. 2018. PMID: 29698499 Free PMC article.
Dynamic sitting: Measurement and associations with metabolic health.
van der Berg JD, Stehouwer CDA, Bosma H, Caserotti P, Eiriksdottir G, Arnardottir NY, Van Domelen DR, Brychta RJ, Chen KY, Sveinsson T, Johannsson E, Launer LJ, Gudnason V, Jonsson PV, Harris TB, Koster A. van der Berg JD, et al. Among authors: johannsson e. J Sports Sci. 2019 Aug;37(15):1746-1754. doi: 10.1080/02640414.2019.1592800. Epub 2019 Mar 30. J Sports Sci. 2019. PMID: 30929574 Free PMC article.
Longitudinal Change in Adolescent Bedtimes Measured by Self-Report and Actigraphy.
Brychta RJ, Rögnvaldsdóttir V, Guðmundsdóttir SL, Stefánsdóttir R, Hrafnkelsdóttir SM, Gestsdóttir S, Arngrímsson SA, Chen KY, Jóhannsson E. Brychta RJ, et al. Among authors: johannsson e. J Meas Phys Behav. 2019 Dec;2(4):282-287. doi: 10.1123/jmpb.2019-0021. J Meas Phys Behav. 2019. PMID: 31799503 Free PMC article.
[Physical activity and sleep in Icelandic adolescents].
Rognvaldsdottir V, Valdimarsdottir BM, Brychta RJ, Hrafnkelsdottir SM, Arngrimsson SA, Johannsson E, Chen KY, Gudmundsdottir SL. Rognvaldsdottir V, et al. Among authors: johannsson e. Laeknabladid. 2018 Feb;104(2):79-85. doi: 10.17992/lbl.2018.02.173. Laeknabladid. 2018. PMID: 29388918 Free PMC article. Icelandic.
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